FIELD: construction.
SUBSTANCE: blade is equipped with hard-alloy elements (3), made with a cross section in the form of a fork having at least three teeth. At the same time the middle tooth or teeth (4) of the fork are submerged in a slot (2) or slots of the blade, and side teeth (5) cover the front (6) and rear (7) surfaces of the blade so that they are partially submerged into the blade body relative to these surfaces.
EFFECT: increased resistance to blade damage, its increased reliability.
10 cl, 3 dwg
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